Binding post



March 16 1926. 1,576,604

, c. HARDY BINDING POST Filed June 17 1925 INVENTOR ChorIes Harol g BY rATTO NEYS I PatentedMar. 16, 1926 'i I UNITED STATES PATENT OFFICE.

CHARLES HARDY, OF NEW YORK, N. Y., ASSIGNOR '1'0 .AIMSGO PRODUCTS, INC,01 NEW YORK, 1\To Y., A CORPORATION OF NEW,YORK.

BINDING ros'r.

Application filed June 17, 1925. Serial no. 37,652.

To all whom it may concern:

Be it known'that I, Cmnnns HARDY, a citizen of the United States, andresident of New York city, in the county of Bronx and State of New York,have invented certain new and useful Improvements in Binding Posts,ofwhich the following is a specificatiom f This invention relates tobinding osts, and more particularly to an improved inding post of thetype in which the clampmg cap and the stem or post are so coordinated asto prevent the withdrawal or removal of the cap from the stem.

The principal objects of my present m1 vention comprehend the provisionof a bind ing post having a non-removable clamping cap designed andconstructed so that the cap is efficiently guided on the stem for secureclamping operation, the parts of the cap and stem being so coordinatedas to maintain the coaxial relation between the same during use; and theprovision of a binding post of this nature which may be manufactured atlow cost and assembled with ease, and which may be made in a variety offorms.

To the accomplishment of the foregoing and such other objects as willhereinafter appear, my invention consists in the elements and theirrelation one tothe other, as hereinafter more particularly described andsought to be defined in the claims; reference being had to theaccompanying drawings which show the preferred embo iments of myinvention, and in which:

Fig. 1 is an elevational view with parts shown in section of theimproved binding post embodying my invention,

Fig. 2 is a perspective view of the same showing the parts in"relatively detached relation, exemplifyin the manner of assembling thesame, an e Fig 3 is a view of a modificat1on w th parts broken away toshow the construction thereof. I

Referring now more in detail to the drawings and having reference firstto Fig. I

thereof, the binding-post of my invention comprises a stem or postgenerally designated as S, and a clamping cap generally designated as Cmovable on the post in the performance of the clamping operation, thesaid stem S and cap C being coordinated to prevent removal or withdrawalof the I The stem S in the preferred construction comprises a threadedand for receiving a nut 10 aWhlCh, forms a; clamping member, the saidstem further including a head [t on which the cap O is movable, the saidhead, It having a smooth-fated cylindrical body portion 11 and acylindrical flanged top portion 12, both free from of the shank 8,thereby providing a shoulder 13 forming an abutment or stop for theclamping member 10.

The clamping cap C comprises a body member 14 having an enlarged cavity15 open at the top and a reduced portion 16 having as smooth cylindricalinterior wall which slidably mates with the cylindrical body portion 11of the stem, the interior wall of the enlarged cavity 15 beingpreferably dimensioned to similarly mate with the outer wall of theflanged top portion 12 of the stem head. I

By providing a close or fitting engagement betweenthe body and flangeportions of the stem head 71, and the interior walls of the cap C, itwill be a parent that the clamping cap may be axial y moved on the stemhead to and fromthe clamping member -10'witliout binding and with aclose fit to secure an effective clamping operation. Moreover, by theprovision of a head having a smooth cylindrical body portion such as 11and a cap'havingthe interior cylindrical mating Wall 16, an elongatedbearing for the stem head is provided, which permits the stem to remainalways axially disposed relative to the cap, the close fit between theseparts,

moreover, preventing any entanglement with any conductor clamp betweenthe clamping members, The cylindrical body portion 11 is preferablyprovided with a conductor receivmg transverse orifice 17 locatedadjacent the clamping member 10.

For axially and rotatably moving the cap on the stem, the head hof. thestem is provided with an axially tapped. bore 18, and the cap G is provie cap from the stem during unclampingLoperashank 8 adapted for threadedattachment to a suitable support 60 escribed more in detail hereinafter.

a with a headed 0 T screw member 19, the head of which is secured to thecap O, as will be described presentl and the screw portion 21 of whichthreade y mates with the axial tapped bore assembling operation of theparts, as will be clearly apparent from a consideration of Fig. 2 of thedrawings. Referring to the figure, it will be seen that in themanufacturing of the parts, the body portion 14 1s 0 en at the top andprovided with a marglnal upstanding flange portion 22 through which opentop the stem S is inserted when the arts are assembled. After the stem Sis inserted in the body ortion of the cap, the headed screw 19, which ispreferably threaded into the head it of the stem prior to the insertionof the latter in the cap body, is secured in position by inwardlycrimpin the mar inal flange portion 22 onto the head 20 of t e screwmember 19 from the position shown in Fig. 2 to that shown in Fig. 1 ofthe drawings, fixedly clamping the headed screw to the cap body.

The binding post ma be ma e wholly of metal, or may be provi ed with adecorative unclamping position, the said ca head of insulating material,the former being shown in Fig. 1 and the latter in Fig. 3 of thedrawings. The body portion 14 of the cap G is provided with a knurledouter wall section 23 which may form a finger grip for the binding postwhen made wholly of metal, or which may form a gripping surface for amolded insulation head 24 when a decorative head is desired. Preferablythe head 20 of the screw member 19 is notched as at 25, this notchserving to receive part of the molded insulating com ound, as clearlyshown in Fig. 3 of the rawings, whereby the headed screw member is morepositively locked to the insulating head and to the body portion 14 ofthe cap C.

The manner of making, assembling and using the improved binding post ofmy invention and the many advantages thereof will in the main be fullyapparent from the above detailed description thereof. It will beapparent that the parts may-be manufactured inexpensively, and may bereadily assembled, producing a binding post in which the cap isnon-removable when rotated to being smoothly rotatable on the head of te stem, the cap being so guided 0n the head as to always maintain thecoaxial relation between the stem and the cap. It will befurtherapparent that the construction is moreover such that all-metalbinding posts with non-removable heads may be manufactured cheaply, thesame being adapted for receiving decorative molded insulation coverings.It will be further seen that the mating threads on the stem head and capare concealed and housed in a manner to prevent and mutilation of thesame during use. It will be apparent that while I have shown myinvention in the preferred forms, that changes and modifications may bemade in the construction shown without departin from the spirit of theinvention as define in the following claims.

I claim:

1. An electrical binding post comprising a stem having a threaded shankadapted to receive a clamping member and havin a flanged head providedwith a smooth cylindrical exterior wall of a diameter greater than thatof the shank, whereby a stop shoulder for the clamping member isrovided, the said stem head being also provlded with an axial tappedbore open at the top and with a transverse conductor receiving orificelocated adjacent said stop shoulder and communicating with the tappedbore, and a clamping cap movable on the stem head to and from theclamping member, said cap being provided with a smooth cylindricalinterior wall slidably mating with the smooth cylindrical exterior wallof the stem head and cooperating with said flanged head to prevent capwithdrawal the cap being also provided with a centrally arranged separate depending screw member fixed to the cap and threadedly mating withthe tapped bore of the stem.

2. An electrical binding post comprising a stem including a head havinga smooth faced cylindrical body portion and a flanged top portion, and aclamping cap movable on said stem head, said cap bein provided with anenlarged cavity for the anged top portion of the head and with a reducedportion havin a smooth cylindrical interior wall slidab y mating withthe cylindrical body portion of the stem head, the said reduced gortionof the cap cooperating with the anged top portion of the head to preventwithdrawal of the cap from the stem,the said stem head having an axialtapped bore open at the top and the said cap being provided with acentrally arranged separate depending screw member fixed to the cap andthreadedly mating with the tapped bore of the stem head.

3. An electrical binding post comprising a stem including a threadedshank ada ted to receive a clamping member and a ead having asmooth-faced cylindrical body portion and a smooth-faced cylindricalflanged top portion, the cylindrical body portion of the head having adiameter greater than'that cap movable on said stem head to and rom saidclam ing member, said cap being prov vided wit an enlarged cavity thewall'of which guidingly fits the flanged top portion of the head andwith a reduced portion having a smooth cylindrical interior .wallslidably mating with the cylindrical body portion of the stem head, thesaid reduced member fixed to the cap and forming a'to closure therefor,the screw member thre edly mating with the tapped bore'of the stem 40head. i

5. An electrical binding post comprising a stem havinga'head including asmooth- Y faced cylindrical body portion and a flanged top portion, aclamping cap movable onsaid stem head, said clam ing cap comprising abody member provi ed with an enlarged open top cavity for the flangedtop portion portion of the cap cooperating with the of the head and witha reduced portion havflanged top portion of the head to preventwithdrawal of the cap from the stem, the saidstem head having an axialtapped bore open at'he top, and a separate headed screw member fixed tothe .cap and forming a top closure therefor, the screw member threadedlymating with the tapped bore of the stem head.

4. An electrical binding post comprising a stem including a head havinga smoothfaced c lindrical body portion anda smoothfaced flanged topportion, a clampin cap movable on said stem head, saidcap lieingprovided with an enlarged cavity the wall of which guidin'glyfits theflanged top portion of-the head and with a reduced portion having asmooth cylindrical interior wall slidably mating with the cylindricalbody portion of the stem head, the said reduced portion of the capcooperating with the flanged top portion of the head to preventwithdrawal of the cap from the stem, the said stem head having an axialtapped bore open at the top, and a separate headed screw ing a smoothcylindrical interior wall slidably mating with the cylindrical bodyportion of the stem head, the construction being such that the stem isinsertable through the open top of the cap body, the reduced portion ofthe cap cooperating with the flanged top portion of the head to preventwithdrawal of the cap from the stem, the said stem head having an axialtapped boreopen at the top, the said cap further including a notchedheaded screw member separate from but fixed to the cap body after thestem is in-' serted through the same and forming a top closure for thecap, the screw member threadedly mating with the tapped bore of the stemhead, and a molded insulation head for the'cap part of the moldedinsulation being lodged 1n the notch of the screw member for positivelylocking the screw member against rotation on the cap.

Signed at New York city, in the county of New York and Stateof New York,this 10th day of Tune A. D. 1925.

CHARLES HARDY.

